Study of the magnetic diffuse scattering in Sr3Ir2O7
Layered perovskite iridates realize a rare class of Mott insulators, which are predicted to be the strongly spin orbit coupled analogues of the parent state of cuprate high temperature superconductors. The ground state of Sr3Ir2O7 (Sr327) is an antiferromagnetic insulator with a gap of 100meV and the electronic structure of this compound seems to be intimately coupled to its magnetic structure. Indeed, transport and angle resolved photoemission spectroscopy studies show that the electronic density of states near the Fermi level changes in the vicinity of the AF ordering temperature (TN=280 K). Additionally, the in-plane resistivity shows a strong enhancement below T*=70K in this material, which corresponds to a glassy-like transition according to magnetization data. A possible explanation of this glassy behaviour would be the freezing of an orbital or charge phase into an inhomogeneous textured electronic ground state. Our recent polarized neutron diffraction data evidence the presence of a low temperature diffuse magnetic scattering at 8K that vanishes at 150K, possibly associated with this freezing. We ask for 10 days on D7 to study this diffuse scattering.
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BOUNOUA Dalila; Bourges; MANGIN-THRO Lucile; SIDIS Yvan and VERSEILS Marine. (2020). Study of the magnetic diffuse scattering in Sr3Ir2O7. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-504
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